Comment on

• Effect of orthodontic treatment with 4 premolar extractions compared with nonextraction treatment on the vertical dimension of the face: A systematic review.

  Kouvelis G, Dritsas K, Doulis I, Kloukos D, Gkantidis N. Kouvelis G, et al. Am J Orthod Dentofacial Orthop. 2018 Aug;154(2):175-187. doi: 10.1016/j.ajodo.2018.03.007. Am J Orthod Dentofacial Orthop. 2018. PMID: 30075920
• Vertical dimension of the face: Result of four premolar extractions or posterior teeth position.

  Silva Campos MJ, Caetano PL, Tanaka OM, de Faria FR, Vitral RWF. Silva Campos MJ, et al. Am J Orthod Dentofacial Orthop. 2019 Mar;155(3):305. doi: 10.1016/j.ajodo.2018.12.009. Am J Orthod Dentofacial Orthop. 2019. PMID: 30826028 No abstract available.